4.5 oz., 60/40 ringspun cotton/polyesterLight Steel is 90/10 cotton/polyesterMoisture-wicking propertiesVapor control technology that adjust to body temperatureTested and approved for all screen print techniquesDouble-needle cover-seamed neck with 3/4" lay flat collar Shoulder-to-shoulder taping40 UPF ratingCPSIA tracking label compliantBlack label